54405 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 73% of adults in 54405 typically vote, above the U.S. average of about 62%. Among adults in 54405, ~23% vote Democratic, ~50% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How 54405 compares
Among zip codes within 15 miles, 54405 is the least Republican-leaning.
54405 runs about 37 points more Republican than Wisconsin as a whole.
Politics vary noticeably by block within 54405. The southwest side is the most Republican-leaning (R+48) and the north side is the least Republican-leaning (R+31), a spread of about 17 points.
Why 54405 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 54405, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 13% of adults in 54405 hold a bachelor's degree, about 13 points below the Wisconsin average of 26%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 54405, WI sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 54405 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 54405 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Wisconsin Elections Commission, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.